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monnapomona
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Homework Statement
Find the mass and center of mass of the lamina that occupies the region D and has the given density function ρ.
D is bounded by the parabolas y = x^2 and x = y^2; ρ(x, y) = 23√x
Homework Equations
m = [itex]\int[/itex][itex]\int[/itex][itex]_{D}[/itex] ρ(x, y) dA
x-bar = [itex]\int[/itex][itex]\int[/itex][itex]_{D}[/itex] x*ρ(x, y) dA
y-bar = [itex]\int[/itex][itex]\int[/itex][itex]_{D}[/itex] y*ρ(x, y) dA
The Attempt at a Solution
I integrated 23√x using order dydx with limits: x^2 ≤ y ≤ √x and 0 ≤ x ≤ 1.
m = 69/14.
The problem I'm having is with the coordinates. I first got (x-bar,y-bar) as (14/62, 28/1265) but that was wrong in my online assignment. I used the same limits of integration and the above equations to find x-bar and y-bar. I don't know where I'm going wrong with the coordinates... Am I suppose to be using different limits?
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